I've recently picked up Crysis on Steam and have noticed that the helicopters exhibit some very annoying behaviour. They seem to be able to spot you from miles away, regardless of whether you are hiding or cloaked (fair enough if they have IR sensors, but it's no fun if you can't hide), and while their shots do very little damage, they come in extremely rapid succession. Basically they are a pain and feel a little out of context with the rest of the game. Are there any mods that improve their behaviour?
The helicopters in Half Life 2 were always an enjoyable fight, whereas these are most definitely not.